Ecology:Tulumella bahamensis is a relatively euhaline neritic species that lives near the density interface of the halocline. In Lucayan Caverns, thermosbaenaceans are the most abundant animal in the water column, with as many as 20 individuals per cubic meter. They are typically found in association with a number of other stygobitic taxa including remipedes (Speleonectes, Cryptocorynetes, Godzillius, Pleomothra and Godzilliognomus), amphipods (Bahadzia and Spelaeonicippe), isopods (Bahalana), mysids (Stygiomysis), ostracods (Deeveya and Spelaeocia) and fish (Lucifuga). T. bahamensis occurs sympatrically with T. grandis in Lucayan Caverns, Dan's Cave and El Dorado Cave.

Life History: The 6 specimens reported by Yager (1987) were all females.

Evolutionary Origins: The distribution of thermosbaenaceans with hypogean species in the West Indies, Yucatan, Texas, the Canary Islands, the Mediterranean region, Somalia and Cambodia is taken to indicate a Tethyan origin associated with the breakup of Pangea in post-Jurassic time (Schram, 1986; Cals & Monod, 1988).

Conservation Status: Known from inland blue hole caves on both the Great Bahama and Little Bahama Banks.